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Finding the Fourth Proportional to 49.37, 68.15 and 30.97

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Solution

The fourth proportional to 49.37, 68.15 and 30.97 is: 42.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.37 : 68.15 = 30.97 : x
  2. Step 2: Convert to fraction form
    49.37/68.15 = 30.97/x
  3. Step 3: Cross multiply
    49.37x = 68.15 × 30.97
  4. Step 4: Simplify right side
    49.37x = 2,110.65
  5. Step 5: Solve for x
    x = 2,110.65/49.37
  6. Step 6: Final answer
    x = 42.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.